Grouping Form Data

The <fieldset> element is used to group related data in a form. When is used, it draws a box around these elements. 
The <legend> element is used to define a caption for the <fieldset> element.

<fieldset>
   <legend>
      Please, fill in the following information:
   </legend>
   <label for="firstname">First name:</label>
      <input type="text" name="firstname" id="firstname"
         placeholder="Your name goes here"
         size="20" autofocus="autofocus" required/> <br><br>
   <label for="secretword">Your password:</label>
      <input type="password" name="secretword" id="secretword"
         placeholder="Your password goes here"
         size="20" required/><br><br>
</fieldset>

Fieldset legend